fix(resolve): refuse ambiguous same-line Python receivers by bompus · Pull Request #404 · bompus/codegraph

bompus · 2026-10-06T15:11:49Z

Python receiver assignments on one line could link a later call to the first constructor, even after replacement with a different class or an unknown value. A returned lambda could also keep one target despite being invoked on both sides of a same-line replacement.

The resolver now leaves these ambiguous receivers unlinked. It also refuses a call before its lone same-line assignment, while retaining a constructor assignment that finishes before the call and stable annotated parameters. Compatible unaliased imports such as import pkg.a, pkg.b retain the same package receiver; aliases and ordinary replacements remain distinct bindings. This conservative rule can omit valid calls when multiple bindings share the selected line; it does not add invocation-order analysis or statement offsets to the binding schema.

This closes the same-line limitation recorded in #395 and #403. The README's About this fork Python receiver bullet and the languages reference describe the boundary. Its language inventory, upstream merge point and measured-result rows were checked and remain unchanged.

Validation on Node 24:

Seven receiver regressions fail against the baseline kernel. The method-value replacement regression also fails against baseline. Three annotation regressions fail against the initial guard. Two comma-import regressions fail at the original PR head; the corrected candidate passes all 138 focused tests.
Native release build, Clippy and application build pass. An initial Clippy comparison lint was corrected before the final build.
All 13 golden/README checks pass; regeneration changes no dumps.
Flask, Vite and Gin precision controls pass. Complete call/reference edge comparisons find no losses or gains in any corpus.
Full suite passes: 606 files, 7,810 tests, 39 existing skips. Test-floor and whitespace checks pass.

Annotation-first replacement masking and compatible package-import ties were fixed, and the duplicate control was removed while its existing owning case remains. Focused regressions and the required checks verify the correction; no further review round ran.

bompus · 2026-10-06T15:12:23Z

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coderabbitai · 2026-10-06T15:12:49Z

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📒 Files selected for processing (4)

README.md
__tests__/receiver-scope-lookup.test.ts
codegraph-kernel/src/resolve/prefilter.rs
site/src/content/docs/reference/languages.md

🚧 Files skipped from review as they are similar to previous changes (4)

README.md
site/src/content/docs/reference/languages.md
codegraph-kernel/src/resolve/prefilter.rs
tests/receiver-scope-lookup.test.ts

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📝 Summary

Summary by CodeRabbit

Bug Fixes
- Python method calls no longer link to a stale receiver type when same-line assignments make the receiver type uncertain. Calls with a reliable receiver type can still be linked, including after compatible unaliased imports from the same package.
Documentation
- Clarified how same-line assignments and imports affect Python receiver linking, including cases where calls may remain unlinked.

Walkthrough

The Python receiver resolver now leaves references unresolved when same-line bindings make statement order insufficient to establish a reliable receiver type. Tests and documentation cover ambiguous bindings, stable receiver cases, and compatible package imports.

Changes

Python receiver resolution

Layer / File(s)	Summary
Detect uncertain receiver bindings `codegraph-kernel/src/resolve/prefilter.rs`	The prefilter deduplicates package imports that share a binding line. It marks bindings uncertain when same-line assignments or tied binding rows prevent reliable receiver resolution. Annotation detection scans assignments on the binding line and recognizes matching annotated targets without values.
Apply and document uncertainty rules `codegraph-kernel/src/resolve/pipeline.rs`, `__tests__/receiver-scope-lookup.test.ts`, `README.md`, `site/src/content/docs/reference/languages.md`, `CHANGELOG.md`	`resolve_ref` rejects references marked uncertain. Tests cover same-line package imports, assignments, annotations, receiver replacements, and method values. Documentation and the changelog describe the inference behavior and its limits.

Priority: ⬇️ Low

Merge Risk: ⚪ Minimal · up to 1c19c

The change makes Python receiver resolution more conservative when bindings share a line. It may leave some valid calls unlinked, which the PR documents as an intentional tradeoff. No actionable merge-blocking risk is identified.

🚥 Pre-merge checks | ✅ 6

✅ Passed checks (6 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Suppressions Explained	✅ Passed	The pull request adds no lint, type-check, or compiler suppression directive. The complete diff adds receiver-resolution logic, tests, and documentation; no changed line adds or broadens a suppression…
User-Visible Changes Documented	✅ Passed	The diff changes Python receiver-resolution behavior, adds regression tests, and updates the README and Python language reference. It does not add, remove, or rename a CLI command or flag, an MCP tool…
Title check	✅ Passed	The title clearly summarizes the main change: refusing ambiguous same-line Python receiver resolution.
Description check	✅ Passed	The description explains the receiver-resolution changes, their documented boundaries, and reported validation. It is directly related to the changeset.

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Inline comments:
Review comments at @codegraph-kernel/src/resolve/prefilter.rs:
- Around line 639-640: Update the binding collection and tie check around
`resolve_ref` to count compatible same-line Python package imports as one
binding, while preserving ties with other same-line bindings. Use the existing
package-import compatibility checks and leave unrelated binding handling
unchanged.

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Reviewing files that changed from the base of the PR and between b471cf0 and d986b2f.

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CHANGELOG.md
README.md
__tests__/receiver-scope-lookup.test.ts
codegraph-kernel/src/resolve/pipeline.rs
codegraph-kernel/src/resolve/prefilter.rs
site/src/content/docs/reference/languages.md

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fix(resolve): refuse ambiguous same-line Python receivers

d986b2f

coderabbitai Bot reviewed Oct 6, 2026

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Comment thread codegraph-kernel/src/resolve/prefilter.rs

fix(resolve): retain compatible same-line Python package imports

1c19c07

bompus merged commit 61c5b6c into fork/consolidated Oct 6, 2026
6 of 7 checks passed

bompus deleted the fix/python-same-line-receiver branch October 6, 2026 15:56

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fix(resolve): refuse ambiguous same-line Python receivers - #404

fix(resolve): refuse ambiguous same-line Python receivers#404
bompus merged 2 commits into
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fix/python-same-line-receiver

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